Stove



Patented Oct. 13, 1925.

WILLIAMFZJOHNSTOR; 0F: BOWESMUN'I; NORTH: DAKOTA-.2 i

STOVE.

Application fil e diDeicember 16,1924. Serial- No. 756,250.:

Toall whom it concern Be it known that I; VV'ILLIAM JOHNST N,

acitizen of'the United'St-ates,:residing at Bowesmont in the county offPeinbina and State of North'D'a'kota, have invented a new and useful Stove, of which the following is a specification.

This invention relates to stoves and has special reference to an improvementjwhich renders it practical to burn lignite or slack coal. a

In places Where lignite \and; simila soft coal is used in stoves and furnaces diflicul'ty' is experiencedin obtaining proper coinbustion, when the fuel hasbecome slack], as lignite WVill after: a considerable. exposure to the air. When such vcoal is employed in stoves of ordinary construction :gas explosions frequently occur and thefire is oftensin-othered by? the application of new coal in consider able quantities. Thi'sfiis duetotihe fact that the fineness of theicoal preventsithe proper amount ofaiir necessary'for combustion from penetrating the coal with" the result thatexe plosive gases are generated and pass. upwardlyfinto the combustionchamber Wherethey are ignited from sparks orflames tha-t escape from the bed offburning coalf:

This coal when burning pr'pducesheavy dark smoke and is slow to ignite. Atlhick' black heavy sootsoon fills upthe'stovepipe;

and it is i to overcome these objectionable; features that this application is designed The primary objectof the invention is to produce a stove .so constructed. that even large quantities of slack icoaln aybe fed into the stove Without "danger of ,explodingygasesdetails. of construction herein after described. and claimed, nit" being iunderstood that 1' changes in the precise embodiment'o-f the in-ev vention herein disclosed may be made Withinthe scope ofwhat is claimed Without departing trolnthe splrltofthe invent on;

In the accompanyingdrawings:

Figure 1. represents a vertical section of. a stovecon'structed in accordance; withwthis.

invention;

Fig. 21s a slde elevation thereof withv the caslng 1n section 5 .p

Fig.3 is a side elevation; ofthe'wind'vane and funnel usedto supply air;

Fig. Klis a'detail'plan View; and

Fig.6 is a detailsection-al view of thetwo, Way' valve --used.-

The stove-constitutingthis inventioncomprises an ash pit-1 mounted on suitable legs, in the usuallinanner'with a fire pot/2 are ranged over it and having a; grate 3'"l0cate d beti'veen them; The upper portion of theffire" box 2"i's inade substantially cylindrical as shown at4 and-is equippiediwitlia band.- halving openings 6 thereinto permit-the heat and flame from the fire boxtofpass out-into, a casing 10 which surround'sthestove proper.' Thecasing 10 encompasses thestove'froln a- 7 point near its top to its bottom andis closed at both ends beingjequipped at its lower end, With a door 11 toaiforda'ccess to'theashpit. A flue for theproducts"offlcoinbustion is shown at 12 a nd' leadsifroin-itlie upper end of casinglO to a chimney or, other. suitable; point. 3 p a A magazine13 risesfrom the zap'ertured band! Sand is preferably made tapering. to-; ward itsrup'perend to prevent packing oi the; coal and insure its" proper fecdingio the fire pot; This "magazine- 13 is equipped atits up-v per end" with" an airtight closure 1 1? which, closure is removable to provide for; theffill'ing ofthemagazines i 3 AI coiled pipe 1,5 surrounds the. n iagazine and the pot of-Lthe stovefwithin the casing: 10,"tlhe upper end of's aid'pipe extending throughithetop. 0d the casing andequipped outs'idefsaid; casing withra two vivay, valve 16 having an. opening. 16?" TWliiclil discharges to the atmosphere. This. valve l6.jshowni in" dta i'l'in Fig. 4s w-hen positioned ask-therein. shown, brings pipes 1.77am 15 into: communi: cation; When thelvalveis turned to bring opening, 16? intoregisteivwith wthe outlet. 16? it {will out OE-pipe L7 aind bring pipe 15Vinto cornin unication with the? atmosphere through} openings 16t'. and 16 9 The pipe, 15ibeyondi the. valve: 16 connects, with an air supply pipe IT \vhiclinis; showmbroken trimmer-swin but whic'lii is. :designed to ;be connectedjv with a weathenvane which when. the-.vvind; blows willlr evolv'e aindifvorce air down through pipe 17 "i and- :When the valve 16 is open tozbrin g a openings 16". and 16.. into registena Thisairl pi ses through thel .coils3;ofi pipe; 151 and, is.

' ,heated i beforeiit leaves" saidfcoils theme;

tom of the stove through pipe 18 having a cut otl valve 19 therein. The pipe 18 is connected with another pipe 20 which leads into a gasometer 30 for a purpose presently to be described.

The pipe 20 has a cut ofi valve 21 in rear of its connection with pipe 18 and a branch 20 in front of said connection, said branch having a cut ofi' valve 20. This branch 20 is designed to let the hot air out to the atmosphere. This pipe 20 which extends under the casing and up to a point above the stove is also equipped with a out off valve located between pipes 18 and 20. A branch pipe 22 leads from the upright portion of pipe 20 and extends into the fire pot Where it discharges in ets into the coal near the center of the column of coal when it is discharged from the magazine. This pipe 22 is provided outside the casing 10 with a cut oil valve 22 for controlling the air supplied through pipe 22.

The space between the casing 10 and the coils 15 is employed to carry olf any smoke which may be generated when the jets are partially cut ofi to regulatethe temperature in the room.

A weather vane 25 is carried by a sleeve 26 mounted to revolve on the upper end of pipe 17 and is equipped with a tunnel shaped air intake 27 through which air enters and is directed through pipe 17 into the branch pipe 22 which discharges it through jets 23 into the coal in the stove.

It will thus be seen that when the wind blows a, fire may be easily started with lignite coal as easily as with any other coal owing to the jets of air forced into the coal to promote combustion. However the wind does not always blow and in order to produce the necessary draft and tide over calm days air is stored up in the gaso-meter 30 and then used to supply the necessary draft in time of calm when the weather vane is not working.

The gasometer 30' is of usual construction being here shown mounted on a suitable stand 31 and comprising a cylindrical water container or tank 32 inv which is mounted to slide a gas bell 33 the inner end of which is submerged in the water tank 32. The pipe 20 extends up through the bottom of tank 32 and discharges above the water level under the bell 33. Suitable weights 34 are removably mounted on the bell 33 so as to exert the desired amount of pressure on the air in bell 33, it being understood that when it is desired to use the air stored in said bell additional weights are added which will force the bell down-' ward and the air in it out through pipe 20'back up into branch pipe 22 through which it is discharged into the fire pot and commingled with the gases to promotecombustion. It is of course understood that before the gasometer is employed to supply draft to the furnace the valves 19 and 2-1 are closed.

From the above description it will be obvious that a stove constructed as herein shown and described will be simple, cheap and easily installed and will be automatically controlled by the gasometer.

The gas bell 33 is preferably provided with a vent valve indicated at 35 to provide for the escape of any surplus steam which may generate in the gasometer.

The'apparatus here shown in connection with a heating stove may obviously be used on a cook stove by very slightly changing its construction.

hen desired the valves 16 and 20 are cut off and valve 16 opened which will cause the air entering through pipe 17 to pass down through pipe 20, up through pipes 18 and 15, it being heated in its passage through pipe 15 and then out through valve 16 to the atmosphere.

I claim a 1. A stove of the class described including a fire box having a magazine arranged thereover, a casing surrounding the stove from a point near its top to its bottom, said casing being closed at both ends, a coiled pipe within said casing surrounding the magazine and fire box of the stove, the upper end of the pipe extending through the top of the casing and equipped outside said casing with a cut oil valve, an air supply pipe connected with said pipe beyond said valve, the lower end of said last mentioned pipe having a branch extending through the casing into'the fire box and equipped with a cut off valve located outsideisaid casing.

2. In a stove of the class described, a fire box having a magazine arranged thereover, a casing encompassing said stove and spaced therefrom terminating at its upper end near the top of the stove, a combustion flue leading from the casing, a coiled pipe arranged in 'said casing and surrounding the stove, said pipe extending at its upper end through the topof the casing and its lower end through the bottom of the easing, said projecting endsbeing provided with cut oil valves, an air supply pipe con nected with both of said pipe ends and having cut off valves located adjacent said pipe ends and a branch pipe leading from said air supply pipe and discharging into the fire box of the stove.

3. In a stove of the class described, a fire box having a magazine. arranged thereover, a casing encompassing said stove and spaced therefrom terminating at its upper end near the top of the stove, a combustion flue leading from the casing, a coiled pipe arranged in said casin and surrounding the stove, said pipe extending at its upper end through the top of the casing and at. its lower end through the bottom of the easing, said projecting ends being provided With out off Valves, an air supply pipe connected With both of said pipe ends and having cutoif alves located adjacent said pipe ends, and a branch pipe leading from said air supply pipe and discharging into the fire box of the stove, and a gasometer connected With said lower pipe end and 10 having means whereby the air collected therein may he returned to the fire box of the stove when desired.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature.

VJILLIAM JOHNSTON. 

